Number of orbits of the 4-step recursion mod n.

Terms

a(0) =1a(1) =4a(2) =6a(3) =28a(4) =3a(5) =24a(6) =10a(7) =220a(8) =91a(9) =12a(10) =130a(11) =240a(12) =343a(13) =40a(14) =168a(15) =1756a(16) =19a(17) =364a(18) =22a(19) =132a(20) =81a(21) =2068a(22) =26a(23) =1968a(24) =253a(25) =1372a(26) =2336a(27) =448a(28) =2557a(29) =672